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  #1  
Old 12-15-2003, 11:59 PM
Newbie Benz Driver
 
Join Date: Dec 2002
Location: Between Oakland and Vallejo, CA
Posts: 253
380SL bombed smog, and high duty cycle.

I took my mom's 1984 380SL to the smog station, and while the car passed the HC and CO tests on the dyno with flying colors, the car had a high idle, it was in 850-900 range, when spec is 650RPM. Just a few moments ago, i took my Craftsman DMM, set to duty cycle, i had a wildly fluctating duty cycle of 60-70%. What could be wrong? i tried to fix it previously with a new fuel timing valve and a new O2 sensor.
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Old 12-16-2003, 03:25 PM
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Join Date: Oct 2002
Location: Near Raleigh, NC
Posts: 580
Actually, the fluctuating duty cycle is good news (no faults).
The fact that it is a little high means you are running lean. Try to bring it down to 45-55% using the adjustment screw.
Procedure will be found doing a search.
Good Luck
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Old 12-17-2003, 01:14 AM
Newbie Benz Driver
 
Join Date: Dec 2002
Location: Between Oakland and Vallejo, CA
Posts: 253
Quote:
Originally posted by pesuazo
Actually, the fluctuating duty cycle is good news (no faults).
The fact that it is a little high means you are running lean. Try to bring it down to 45-55% using the adjustment screw.
Procedure will be found doing a search.
Good Luck
tried that, as soon as i pass below 60-65%, the car will die, and will not start unless i spray starting fluid into the air meter, and quickly turn the adjustment screw. Something tells me something is up.
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